How To Proceed With Troubleshooting

HINT.

• Use these procedures to troubleshoot the horn system.
• *: Use the intelligent tester or Techstream

1. VEHICLE BROUGHT TO WORKSHOP 
2. INSPECT BATTERY VOLTAGE 

   Standard voltage: 

   11 to 14 V 

   If the voltage is below 11V, recharge or replace the battery before proceeding

3. INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* 
   1. Using the intelligent tester or Techstream, check if the CAN communication system is functioning normally.

      Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   CAN DTC is not output	A
   CAN DTC is output	B

   B: Go to CAN COMMUNICATION SYSTEM  (See CAN COMMUNICATION SYSTEM )

   A: Go to Next Step 

4. PROBLEM SYMPTOMS TABLE 

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   Fault is not listed in problem symptoms table	A
   Fault is listed in problem symptoms table	B

   B:  Go to step  6

   A: Go to Next Step 

5. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. Data List / Active Test (see DATA LIST / ACTIVE TEST )
   2. Terminals of ECU (see TERMINALS OF ECU )
6. ADJUST, REPAIR OR REPLACE 
7. CONFIRMATION TEST 

   NEXT: END